Plant Parasites of Europe

leafminers, galls and fungi

Hypericum maculatum

imperforate st john’s-wort

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Thripidae Thrips alni
leaf leaf spot Mycosphaerellaceae Passalora hyperici
leaf leaf spot Sporocadaceae Diploceras hypericinum
leaf leaf spot Mycosphaerellaceae Ramularia hyperici
leaf leaf spot Mycosphaerellaceae Ovularia minutissima
leaf leaf spot Capnodiales Sphaerulina hyperici
leaf vagrant Geometridae Siona lineata
flower vagrant Geometridae Eupithecia orphnata
stem borer Gelechiidae Oxypteryx atrella
leaf vagrant Cicadellidae Zygina hypermaculata
fruit borer larva Apionidae Pseudoperapion brevirostre
leaf vagrant Chrysomelidae Chrysolina varians
leaf vagrant Chrysomelidae Chrysolina hyperici
leaf vagrant Chrysomelidae Chrysolina brunsvicensis
leaf vagrant Chrysomelidae Chrysolina geminata
leaf vagrant Tenthredinidae Tenthredo balteata
leaf vagrant summer generation Aphididae Aphis fabae fabae
flower gall Cecidomyiidae Contarinia hyperici
leaf bud gall Cecidomyiidae Dasineura serotina
leaf bud gall Cecidomyiidae Zeuxidiplosis giardi
leaf down Erysiphales Erysiphe hyperici
leaf miner Gracillariidae Euspilapteryx auroguttella
leaf miner Lyonetiidae Leucoptera lustratella
leaf miner Nepticulidae Fomoria septembrella
leaf pustule aecia telia Pucciniales Melampsora hypericorum
leaf vagrant Eriophyidae Aculus hyperici
root collar vagrant Aphididae Aphis chloris
root gall Cecidomyiidae Geocrypta braueri


the part of the plant that most conspicuously is hit by the parasite

all buds: both flower buds and leaf buds
flower: also inflorescence
leaf: also needle, phyllodium, petiole
leaf bud: also unfolding young leaf
fruit: also seed
root: also root stock, runners
root collar: also the lowest part of the stem
stem: also culm, the lower part of the peduncle, in grasses also leaf sheath
systemic: the entire above-ground plant.


borer: larva living internally, almost no outwards signs
down: 0.5-2 mm high fungal down
film: very thin cover of fungal tussue
gall: swelling and/or malformation
grazer: feeding at the outside of the plant
leaf spot: discoloured, often ± necrotic, generally not galled, sign of a fungus infection
miner-borer: larve initially makes a mine, lives as a borer later
pustule: plug of fungal tissue, generally brown-black and < 2 mm
stripe: longitudinal line of fungal tissue in a grass leaf
vagrant: (aphids, mites) living freely on the plant, at higher densitiy causing malformations.


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The host plant spectre of a parasite is rarely known exhaustively; this applies in particular at the species level. It is advisable therefore to check at least also the list of all parasites of this genus.


Last modified 7.x.2023